youth

youth /ˈjuːθ/ noun
plural youths /ˈjuːðz/
youth
/ˈjuːθ/
noun
plural youths /ˈjuːðz/
Britannica Dictionary definition of YOUTH
1 
: the time of life when someone is young : the time when a young person has not yet become an adult
[noncount]
[singular]
— see also fountain of youth
2 
[noncount] : the time when something is new and not yet established
3 
[count] : a teenage boy or young man
4 
the youth : young people
5 
[noncount] : the quality or state of being young

gilded youth

— see gild